Improvement in machines for skiving leather



E. B. STIMPSUN.

NI ach i n es fo r S k H i n g L 93th 0 r.

N0. 138,951. I I Patented Mag 13.1873.

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UNITED STATES PATENT OEEIoE.

EDWIN B. STIMPSON, OF NEW YORK, N. Y.

IMPROVEMENT IN MACHINES FOR SKIVING LEATHER.

Specification forming part of Letters Patent No. 138,951, dated May 13, 1873; application filed April 9, 1873.

To all whom it may concern:

Be it known that I, EDWIN B. STIMPsoN, of the city, county, and State of New York, have invented an Improved Skiving-Machine, of which the following is a specification:

Figure 1 is a side elevation of my improved skiving-machine. Fig. 2 is an end elevation, partly in section, of the same; and Fig. 3, a top view thereof.

Similar letters of reference indicate corresponding parts.

The invention consists in the use of a rota ry and circular pattern, which is hung on a shaft above the cutter of the machine, and over a yielding bed thereof, and which, While the leather is being drawn over the bed and cutter, will be revolved by means of its contact with the leather, and will depress the leather in conformity to the outline of such pattern, causing thereby the cutter to skive the under side of the leather in exact conformity with the shape of the pattern.

In the accompanying drawing, the letter A represents the supporting frame-work or platform of my machine. Upon the same is securely fastened a knife, B, which has a straight or other shaped cutting-edge. (3 is a movable bed or leather-support, made preferably of sheet metal and slotted, so that it can be adjusted any suitable distance from the cuttingedge of the knife B. D is a shaft hung by projecting cranks a a in fixed posts E of the frame A. A circular pattern, E, of the desired outline, and slightly beveled at its edge, is mounted upon and surrounds the shaft D, and extends downward about in line with the space between the cutter and the yielding bed 0. The leather to be skived is drawn over the bed and not affected by the cutter B except where it is being pressed down by the circular pattern F, which pattern revolves as the leather is being drawn forward, and causes thereby the leather to be skived exactly in conformity with the outline of the pattern. By this means the process of skiving can be carried on in rapid succession, producing exactly equal shapes of reduced thicknesses, which is the object to be attained, and for which heretofore usually a manual process was employed, causing considerable loss of time and labor. The shaft D can, on the cranks a, be swung so as to carry the pattern F up to facilitate the introduction of the leather, and for other purposes, and the pattern may be so mounted upon the shaft as to be easily removable and readily replaced by other patterns of suitable style. In working position the shaft D, or rather one of its cranks, may be locked by means of a spring-catch, b.

What is here claimed,'and desired to be secured by Letters Patent, is

1. The rotary pattern F, arranged on a skiving-machine in conjunction with the knife B, substantially as described.

2. The bed 0, combined with the adjustable knife .8 and rotating pattern F of a leatherskiving machine, substantially as specified.

EDWIN B. STIMPSON.

Witnesses:

MICHAEL RYAN, FEED. HAYNES. 

